Expansion of Tai Po Water Treatment Works and Ancillary Raw Water and Fresh Water Transfer Facilities - Design and Build of New Stream II

  • Entrance of Tai Po Water Treatment Works

  • PV Panels and Green Features

  • Vertical Green Wall

  • View of TPWTW from Tolo Highway

  • High Solar Reflectance Material for Roof Area

New Buildings V1.2
Final Platinum

Overall Score
Site Aspects
Materials Aspects
Energy Use
Water Use
Indoor Enviro. Quality
Credit(s)    Innovations and Additions

Tai Po Water Treatment Works (hereinafter referred to as “TPWTW”) is now undergoing an expansion to double the water treatment capacity from the current 400,000m3 per day to 800,000m3 per day upon completion in 2018. The TPWTW covers an area of about 10 hectares, supplying fresh water to Tai Po, West and Central Kowloon, and the Central and Western Districts of Hong Kong Island.  Upon completion of the expansion, the number of building facilities of TPWTW will be increased from the existing 16 to 24, integrated with green features and renewable energy technologies.

Green Features

Site Aspects

  • Implement the Urban Design Guidelines presented in Chapter 11 of the Hong Kong Planning Standards and Guidelines published by Planning Department.
  • Maintain the natural terrain as far as practicable with vertical green and roof edge planting to enhance the quality of the living environment.
  • Adopt roof painting with high Solar Reflectance Index (SRI >78) to reduce the solar heat absorption through the roof, which will otherwise be transmitted into the building and released back to the ambient causing “heat island effect”.

Materials Aspects

  • Choose building products that avoid ozone depleting substances in their manufacturing processes.
  • Use building materials manufactured within 800km from the site to reduce the environmental impacts arised from transportation.

Energy Use

  • Install 624 pieces of Photovoltaic Panel (PV Panel) to generate 200kilowatt of carbon-free electricity to replace more than 3% of the total building electricity consumption.
  • Use light-emitting diode (LED) lighting to reduce lighting energy consumption for the whole TPWTW.
  • Use oil-free magnetic bearing water cooled chillers to enhance the efficiency of the cooling system.

Water Use

  • Harvest the un-used sampling water in water treatment process for reuse.
  • Harvest rainwater for reuse.
  • Reuse sampling water and rainwater to fully replace the daily fresh water consumption including irrigation, toilet flushing and operational use.

Indoor Environmental Quality

  • Design lighting of the newly constructed and existing buildings to optimize the performance of illuminance, glare index and colour rendering index.
  • Provide amenities (e.g. davit arrest system, scissor platform and vertical platform etc.) to facilitate routine maintenance of the treatment works.

Innovations and Additions

  • Adopt stacked process design to reduce the required site area and preserve the natural habitat.
  • Reuse waterworks sludge as planting and backfilling material.


The Water Supplies Department (WSD) is keenly aware of our responsibility towards the environment and is striving to secure, conserve and protect water resources for current and future generations in a sustainable manner. In addition to providing a safe and reliable potable water supply for the community, we are dedicated to reduce environmental impact by integrating green and energy saving initiatives into our water infrastructure and processes.

BEAM Plus is devoted in promoting safer, healthier, more comfortable and more efficient buildings, which is in line with WSD’s missions to maintain and motivate an effective, efficient and committed workforce to serve the community and to remain conscious of our responsibilities towards the environment.

Apart from the new water treatment components, Tai Po Water Treatment Works (TPWTW) has an extensive coverage of existing facilities which were built more than a decade ago. Many innovative and creative solutions were developed to integrate various green and sustainable features into the new as well as the existing buildings, and achieve BEAM Plus accreditation for TPWTW in its entirety as a green infrastructure.

TPWTW is located in a remote area surrounded by hilly and mountainous terrain with limited space and restrictive access.  Designed to build in harmony with the surrounding landscape, a compact plant design with stacking of multi-treatment processes in multi-level buildings was adopted to minimize the footprint of TPWTW, thus leading to reduction of carbon footprint and ultimately creating an environmentally conscious facility.

Sharing the same vision and goal, the project team is forging ahead with huge efforts and continuous collaboration towards delivering a successful green infrastructure project for achieving the BEAM Plus Final Platinum rating, which further demonstrates WSD’s commitment to build a sustainable community.

Project Details

Completion Year 2018
Number of Blocks 24 Blocks
Number of Storeys 1 to 6 Storeys
Type Government, Institutional and Community

Project Team

Project Developer / Owner Water Supplies Department
Project Manager Black & Veatch Hong Kong Limited
Main Contractor China State – ATAL Joint Venture
Environmental Consultant Black & Veatch Hong Kong Limited
Supervising Officer Black & Veatch Hong Kong Limited
Architectural Consultant Black & Veatch Hong Kong Limited; A.Lead Architect Ltd
Landscape Architectural Consultant A.Lead Architect Ltd
Designer China State – ATAL Joint Venture; Ove Arup & Partners Hong Kong Limited
BEAM Plus Consultant BeeXergy Consulting Limited

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